Modeling Variability in Item Parameters in Item Response
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Psychometric Properties of State Level Subjective Vitality Scale based on classical test theory and Item-response theory
The purpose of the present study was to investigate the factor structure and Item-Response parameters of State Level of Subjective Vitality Scale. The research design was correlational, and the statistical population consisted of students of the Shahid Beheshti University of Tehran. Sample group including 240 students were selected through multi-stage sampling and completed Subjective Vitality ...
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